ex_tiff.c File Reference

#include "nilorea/n_common.h"
#include "nilorea/n_files.h"
#include "nilorea/n_log.h"
#include "nilorea/n_tiff.h"
#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>

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Functions
static size_t	build (unsigned char *buf, int be)
	Build a DCP shaped buffer: a name, a short, three signed rationals, two floats, and one entry pointing past the end.
static void	check (const char *what, int ok)
	Count and print a failed condition.
static int	list_file (const char *path)
	List the tags of a file's first directory.
int	main (int argc, char **argv)
	Run the checks, or list a file given as the argument.
static void	put16 (unsigned char *p, uint16_t v, int be)
	Write a 16 bit value in a byte order.
static void	put32 (unsigned char *p, uint32_t v, int be)
	Write a 32 bit value in a byte order.
static void	put_entry (unsigned char *e, uint16_t tag, uint16_t type, uint32_t count, uint32_t value, int be)
	Write one directory entry.
static void	test_broken (void)
	Broken buffers are refused, never read out of bounds.
static void	test_order (int be)
	Parse a built buffer and check every value.

Variables
static int	failures = 0
	failures counted by check()

Function Documentation

build()

size_t build ( unsigned char * buf, int be )

static

Build a DCP shaped buffer: a name, a short, three signed rationals, two floats, and one entry pointing past the end.

Parameters

buf	receives it, 256 bytes
be	non-zero for big endian

Returns

its length

Examples

ex_tiff.c.

Definition at line 93 of file ex_tiff.c.

References N_TIFF_MAGIC_DCP, put16(), put32(), and put_entry().

Referenced by test_broken(), and test_order().

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check()

void check ( const char * what, int ok )

static

Count and print a failed condition.

Parameters

what	what was checked
ok	the condition

Definition at line 47 of file ex_tiff.c.

References failures.

list_file()

int list_file ( const char * path )

static

List the tags of a file's first directory.

Parameters

path

the file

Returns

0, or 1 when it cannot be read or parsed

Examples

ex_tiff.c.

Definition at line 176 of file ex_tiff.c.

References N_TIFF::big_endian, N_TIFF::count, N_TIFF_ENTRY::count, N_TIFF::entries, N_TIFF::magic, n_file_read_bounded(), n_tiff_free(), n_tiff_parse(), N_TIFF_ENTRY::tag, and N_TIFF_ENTRY::type.

Referenced by main().

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main()

int main	(	int	argc,
		char **	argv )

Run the checks, or list a file given as the argument.

-V LEVEL sets the log level, as for every example: run_tests.sh passes it, and before this it was taken for the name of a file to list.

Parameters

argc	argument count
argv	arguments

Returns

0 on success

Definition at line 210 of file ex_tiff.c.

References failures, list_file(), LOG_ERR, log_level, set_log_level(), test_broken(), and test_order().

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put16()

void put16 ( unsigned char * p, uint16_t v, int be )

static

Write a 16 bit value in a byte order.

Parameters

p	where
v	the value
be	non-zero for big endian

Examples

ex_tiff.c, and ex_zip.c.

Definition at line 58 of file ex_tiff.c.

Referenced by build(), put32(), put_entry(), test_broken(), and write_zip().

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put32()

void put32 ( unsigned char * p, uint32_t v, int be )

static

Write a 32 bit value in a byte order.

Parameters

p	where
v	the value
be	non-zero for big endian

Examples

ex_tiff.c, and ex_zip.c.

Definition at line 67 of file ex_tiff.c.

Referenced by build(), put_entry(), test_broken(), and write_zip().

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put_entry()

void put_entry ( unsigned char * e, uint16_t tag, uint16_t type, uint32_t count, uint32_t value, int be )

static

Write one directory entry.

Parameters

e	where
tag	tag
type	field type
count	value count
value	the value itself, or the offset of the values
be	non-zero for big endian

Examples

ex_tiff.c.

Definition at line 81 of file ex_tiff.c.

References put16(), put32(), and type().

Referenced by build().

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test_broken()

void test_broken ( void )

static

Broken buffers are refused, never read out of bounds.

Examples

ex_tiff.c.

Definition at line 158 of file ex_tiff.c.

References build(), check(), n_tiff_parse(), put16(), and put32().

Referenced by main().

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test_order()

void test_order ( int be )

static

Parse a built buffer and check every value.

Parameters

be	non-zero for big endian

Examples

ex_tiff.c.

Definition at line 127 of file ex_tiff.c.

References N_TIFF::big_endian, build(), check(), N_TIFF::count, N_TIFF::magic, n_tiff_count(), n_tiff_find(), n_tiff_free(), n_tiff_get_ascii(), n_tiff_get_doubles(), N_TIFF_MAGIC_DCP, and n_tiff_parse().

Referenced by main().

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Variable Documentation

failures

int failures = 0

static

failures counted by check()

Definition at line 42 of file ex_tiff.c.